21322013029 has 2 divisors, whose sum is σ = 21322013030. Its totient is φ = 21322013028.

The previous prime is 21322012991. The next prime is 21322013039. The reversal of 21322013029 is 92031022312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14853028129 + 6468984900 = 121873^2 + 80430^2 .

It is a cyclic number.

It is not a de Polignac number, because 21322013029 - 2¹¹ = 21322010981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21322012994 and 21322013012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21322013039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661006514 + 10661006515.

It is an arithmetic number, because the mean of its divisors is an integer number (10661006515).

Almost surely, 2^21322013029 is an apocalyptic number.

It is an amenable number.

21322013029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21322013029 is an equidigital number, since it uses as much as digits as its factorization.

21322013029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 21322013029 in words is "twenty-one billion, three hundred twenty-two million, thirteen thousand, twenty-nine".